Furnace-grate.



No; 864,071. PATENTED AUG. 20, 1907.

J. G. BOWRING.

FURNACE GRATE. APPLICATION FILED JAN. 25, 1906.

oo oo W/TNESSES INVENTOI? 4W%A@ JBHN ATTORNEYS In; NORRIS Pnlx: cm, wAsl-lmmu, nc.

UNITED STATES PATENT OFFICE.

JOHN CHARLES BOWBING, OF SYDNEY, NEW SOUTH WALES, AUSTRALIA.

FURNAGE-GBATE.

Application filed January 215,

To all whom it may concern:

Be it known that I, JOHN CHARLES Bownrne, a subject of the King of Great Britain, and a resident of Sydney, in the'State of New South Wales, in the Commonwealth of Australia, have invented Improvements I in Furnace-Grates, of which the following is a specification.

-My invention is an improvement in furnace grates for steam power production and other purposes, and consists in certain novel constructions and combinai tions of parts hereinafter described and claimed.

The object of the invention is to provide a furnace for the production of steam, or for any other purpose where intense heat, economically produced, is required; and further, to provide a furnace which shall enable the fireman to gain the highest furnace efiiciency with the least possible trouble.

Referring to the drawings forming a part hereof Figure l is an end view of a part of a furnace provided with my improvement. Fig. 2 is a transverse vertical section and an end view of the bars. Fig. 3 is a side view of one of the bars. Fig. 4 is a plan view. Fig. 5 is a detail of a part of a furnace provided with the bars showing a part of the end support, and Fig. 6 is a detail of the drag link connection with the bars.

The grate comprisesa plurality of bars parabolic in cross section, and having flanges A at each side of the base thereof. The bars are provided at one end with an arm or lever B projecting downwardly therefrom and provided with a pintle E projecting therefrom. At each end the bars are provided with trunnions or pivots D, which are adapted to rest in seats or sockets in the bearer or end support G. A drag link H is connected with each of the pintles E, whereby to lock all of said bars in unison. Above the flanges and between said flanges and the apex of the bar, the length of the bar is intersected at regular intervals by vertical openings F, and an opening F is also provided at each end. It will be noted from an inspection of Fig. 3, that the openings F taper from the bottom to the top and also from inside the bar to the outside, so that any clinker or ash entering the outside will easily pass to the inside and thence to the ash pit. The drag link may be connected with lever gear outside the furnace, moved by hand or power for the purpose of agitating the whole grate simultaneously. The base level of the grate is the top side of the flanges A between the bars, and as a consequence the bars stand Specification of Letters Patent.

Patented Aug. 20, 1907.

1906. Serial No. 297,921.

up amid the fuel and have fire on both sides as well as above them. These bars may be made of varying height according to the requirements of the furnace, the height depending upon the amount of the disturbance of the fire which it is desired to produce when the drag link is operated, to break up clinkers and caking fuel. The flanges passing each other in the rocking movement of the bars serve to cut up and pass out all dirt and residuum.

' The above construction of furnace provides for the free ingress of a sufiicient volume of air and also for the free distribution of the air equally among the fuel. The arrangement of the fire bars is such that when agitated by the rocking gear they prevent the fuel from cakingor clinkering, and also clean out the ash or residuum from the fuel, thus preserving a free and clean fire so that continuous good combustion is carried on without delay and loss of heat through cleaning fires with open doors and the use of fire tools is prevented.

I claim:

1. An improved fire grate, comprising a plurality of parallel hollow bars parabolic in cross section and provided with trunnions at their ends, and at their sides with narrow flanges, end bars having seats in which the trunnions rest, the bars being arranged with their flanges spaced apart from the flanges of the adjacent bars, whereby when the bars are rocked on the trunnions the flanges will move past each other to exert a cutting action on clinkers, said bars having their apexes upward and being provided with a plurality of openings in each side thereof, and at their ends, and having an arm projecting downwardly therefrom, said arm having a pintle and a drag link engaging the pintles of each of the bars.

2. An improved fire grate, comprising a plurality of hollow bars substantially parabolic in cross section and having trunnions at the ends thereof, and flanges at each side, said bars having their apexes upward and being provided with a plurality of openings at each side thereof, and at their ends, and having an arm projecting therefrom and provided with a pintle, and a drag link engaging all of the pintles.

3. An improved fire grate comprising a plurality of hollow bars substantially parabolic in cross section and having trunnions'at the ends thereof and flanges at each side, said bars having their apexes upward and being provided with a plurality of openings on each side thereof and at their ends, and means for swinging the bars in unison.

Dated this nineteenth day of December, 1905.

JOHN CHARLES BOWRING.

Witnesses L. C. RUSSELL Jones, .TorrN A. J. Pos'r. 

